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DDD-L5DC-86
2_-_Enhancing_Design_(1)

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DDD-L5DC-86

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- DDD_Topic_1_-_Introduction_to_the_Module 10 xp
  - Quiz
- 2_-_Enhancing_Design_(1) 10 xp
  - Quiz
- DDD_Topic_3_-_Enhancing_Design_(2)
- DDD_Topic_4_-_Data_Retrieval_(1)
- DDD_Topic_5_-_Data_Retrieval_(2)
- DDD_Topic_6_-_Physical_Design_(1)
- DDD_Topic_7_-_Physical_Design_(2)
- DDD_Topic_8_-_Physical_Design_(3)
- DDD_Topic_9_-_Physical_Design_(4)
- DDD_Topic_10_-_Distributed_Databases
- DDD_Topic_11_-_Data_Warehouses
- DDD_Topic_12_-_Module_Overview
DDD-L5DC-86
- Test-1

2_-_Enhancing_Design_(1)

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1. Relational Integrity constraints is

Relational Integrity constraints in DBMS are referred only primary key Relational Integrity constraints in DBMS are referred to conditions which must be present for a valid relation Only check constraint

2. Why cannot any part of a primary key be null?

A PRIMARY KEY column is equivalent to UNIQUE Because a null value, being unknown might be the same as the value in the primary key of another tuple.

3. Functional Dependence

If we know the value of A then we will know the value of B Independent value dependent value

4. Normalization is the process of

organizing the data in the database to create table The normal form is used to reduce redundancy from the database table. The normal form is used to use redundancy from the database table.

5. Problems Without Normalization

Null Value Updation Anomaly,Deletion Anomaly Insertion Anomaly, Updation Anomaly,Deletion Anomaly

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